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Tag: "hearts" at biology news

Implanted Devices Detect High-Risk Heart Failure Patients

...ability. Patients with little variability -- whose hearts are unable to appropriately react to external stim... have a very wide footprint, while those with sick hearts would have a narrow footprint that represents the reduced variance in heart rate response," Gilliam ...

Special Imaging Study Shows Failing Hearts Are 'Energy Starved'

...he CK flux. Results showed that CK flux in healthy hearts is adequate to supply energy to the heart over a f... energy supplied by the CK reaction. “The failing hearts have an energy supply deficit,?says Bottomley. “The reduction is sufficiently large that the supply...

Heart repair gets new muscle

...e grown in a test tube or have migrated to injured hearts in study mice. The authors can't say why skeletal muscle would harbor cardiac stem cells, but for now, the Spoc cells provide a valuable tool for studying heart cell differentiation. And with time, they might prove an important resource for developi...

15 generations of untrained jocks, couch potatoes show big physiological adaptations

...oved cardiovascular systems (proportionally larger hearts (16% ) and increased blood flow (33%), reported in Kirkton et al., below) and respiratory systems (proportionally larger lungs (17%) and better oxygen diffusing capacity, reported in Giuliano et al., below) over the G7 stage, the researchers pointed ...

Chemical 'band-aid' prevents heart failure in mice with muscular dystrophy

...death in DMD. The chemical sealant that protected hearts in dystrophic mice from damage is called poloxamer...e ability of P188 to prevent cardiac damage in the hearts of mdx mice. They found that an intravenous infusion of P188 in mdx mice restored the volume of the ...

Implantable pumps extend lives of patients too sick for transplant

...travenous drugs in the hospital just to keep their hearts pumping, and they were also too sick to be conside...re on average of 59 years old and as a group their hearts beat at only 14 percent of normal strength. The pump tested in the trial was the Novacor device, whi...

3D ultrasound device poised to advance minimally invasive surgery

...ratt School of Engineering have imaged the beating hearts of dogs. The engineers said their demonstration showed that the probes could give surgeons a better view during human endoscopic surgeries in which operations are performed through tiny "keyhole" incisions. If the probes prove beneficial in human te...

Rare Tibetan antelope listed as endangered

...ratt School of Engineering have imaged the beating hearts of dogs. The engineers said their demonstration showed that the probes could give surgeons a better view during human endoscopic surgeries in which operations are performed through tiny "keyhole" incisions. If the probes prove beneficial in human te...

Researchers develop portable 'vein finder' for faster, more accurate injections

...he explains. "Similarly, because cardiac patients' hearts aren't pumping properly, their veins are hard to locate. It's also difficult to find veins in obese people and young children because their vessels are covered by layers of fat." In addition to speed, the vein finder's accuracy will make treatment e...

Potential heart benefit found in stem cells

...r eight weeks, the animals were euthanized and the hearts were removed to measure the left ventricle wall thickness and the density of the corresponding capillaries in four areas: the damaged or infarct area, the healthy myocardium (cardiac muscle), and in two parts of the border zone. As predicted, the...

Mice with glowing hearts shed light on how hearts develop

...researchers have genetically engineered mice whose hearts glow with a green light every time they beat. The development gives researchers insights into how hearts develop in living mouse embryos and could improve our understanding of irregular heartbeats, known a...

A case of mistaken molecular identity

... block rhodopsin, and not by inflammation. "In the hearts of Chagas patients, we see scarring because there is a complex reaction that causes inflammation," he said. "But there are no such scars in the eyes of Chagas patients with reduced vision." "No one knew about the night blindness, so we don't know, ...

Thinner and younger

...rage of six years on calorie restriction, people's hearts functioned like the hearts of much younger people. And a team from the Pennington Biomedical Research Center at Louisiana State...

UC Davis researchers move biotechnology closer to replacing electronic pacemakers

...d using animal models such as mice and rats, whose hearts can beat up to 600 times per minute. Large animals...ter of days following the gene transfer, the pigs' hearts had generated bioartificial nodes at the injection sites. Li explained that, through gene expression...

UT Southwestern researchers find gene mutation that leads to 'broken hearts'

...uthwestern scientists engineered fruit flies whose hearts glow by expressing a gene coding for green fluorescent protein specifically in the heart. "This fly with a glowing heart enables us to visualize the details of heart development with high resolution in living animals and to detect cardiac defects tha...

Healing the heart with bone marrow cells

... impaired and, 42 days after a heart attack, their hearts dilated to twice the size of the normal mouse heart. However, the heart function of the c-kit defective mice could be restored to normal by restoring the c-kit cells in their bone marrow, confirming the importance of these cells in repairing the hear...

A surprise about our body clock

... impaired and, 42 days after a heart attack, their hearts dilated to twice the size of the normal mouse heart. However, the heart function of the c-kit defective mice could be restored to normal by restoring the c-kit cells in their bone marrow, confirming the importance of these cells in repairing the hear...

3-D ultrasound scanner could guide robotic surgeries

...evice can produce actual 3-D images of the beating hearts in animals. The team has since demonstrated that the scanner also can be used to laparoscopically image other organs, including the spleen, liver and gall bladder. In the current study, the researchers used the scanner to identify coordinates den...

Cell wall of pneumonia bacteria can cause brain and heart damage

...fter eight hours, and cell wall was found in their hearts and brains. However, all of the Pafr-/- mice survived and almost no cell wall was found outside the blood stream. This suggests that PAFr is required for cell walls to escape the bloodstream and enter cardiomyocytes (heart muscle cells) and neurons. ...

Rescuing injured hearts by enhancing regeneration

...rt function, as measured on echocardiograms: their hearts pumped almost as well as the hearts of uninjured rats. They also had reduced thinning of the cardiac wall and the least amount of scarr...

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